Aidan created a square dart board, as shown below, in his game room. The side lengths of the dart board are 27 inches, the base and height of the right triangles are 10 inches, and the radius of the circle is 6 inches. If it is equally likely that the dart will hit any spot on the board, and the dart is not thrown outside of the board, approximately what is the probability of Aidan throwing a dart that lands in the circle? (Use 3.14 for .)
A.
0.05
B.
0.16
C.
0.27
D.
0.57